Added support for recording dependencies while compiling OpenSCAD files.

2 files changed, 37 insertions, 0 deletions

diff --git a/support/openscad/__init__.py b/support/openscad/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/support/openscad/__init__.py
diff --git a/support/openscad/__main__.py b/support/openscad/__main__.py
new file mode 100644
index 0000000..08b2ab6
--- /dev/null
+++ b/support/openscad/__main__.py
@@ -0,0 +1,37 @@
+import os, sys
+from lib import util
+
+
+def _openscad(in_path, out_path, deps_path):
+	util.command([os.environ['OPENSCAD'], '-o', out_path, '-d', deps_path, in_path])
+
+
+def _write_dependencies(path, target, dependencies):
+	util.write_file(path, '{}: {}\n'.format(target, ' '.join(dependencies)).encode())
+
+
+def main(in_path, out_path, deps_path):
+	cwd = os.getcwd()
+	
+	def relpath(path):
+		return os.path.relpath(path, cwd)
+	
+	with util.TemporaryDirectory() as temp_dir:
+		temp_deps_path = os.path.join(temp_dir, 'deps')
+		temp_mk_path = os.path.join(temp_dir, 'mk')
+		temp_files_path = os.path.join(temp_dir, 'files')
+		
+		_openscad(in_path, out_path, temp_deps_path)
+		
+		mk_content = '%:; echo "$@" >> {}'.format(util.bash_escape_string(temp_files_path))
+		
+		util.write_file(temp_mk_path, mk_content.encode())
+		util.command(['make', '-s', '-B', '-f', temp_mk_path, '-f', temp_deps_path])
+		
+		deps = set(map(relpath, util.read_file(temp_files_path).decode().splitlines()))
+		ignored_files = set(map(relpath, [temp_deps_path, temp_mk_path, in_path, out_path]))
+		
+		_write_dependencies(deps_path, relpath(out_path), deps - ignored_files)
+
+
+main(*sys.argv[1:])